Less colloquial version of "(X), never mind (Y)"?

From Chapter 7, it was found that PV installers do not interact frequently with geographic data within their assessment, never mind 3D geographic data.

"Never mind" seems like a bit of a colloquialism. Do you have any suggestion for a better term or phrase to use?

Solution 1:

As an alternative to never mind (which, by the way, I’ve never seen written as one word), you could use let alone:

In chapter 7, it was found that PV installers do not interact frequently with geographic data within their assessment, let alone with 3D geographic data.

Note the following additional suggestions:

1. In rather than From. You could say: Recall, from chapter 7. But it was found in chapter 7 that such-and-such.
2. A comma after assessment, to separate the subsequent phrase, which adds a further thought to the sentence.
3. Repetition of with before 3D ... data. Otherwise, a reader unfamiliar with this topic (e.g., me) might (and indeed did) think that the missing preposition is the more nearby within, which then requires some mental back-pedalling.

Solution 2:

"Not to mention ..." "Even if we do not consider ..." "This is even more true for ..." "And especially ..."